3TK2827-1BB40.SAFETY RELAY,MECHANICAL,2NO,24V DC SIRIUS safety relay with relay enabling circuits (EC) 24 V DC, 45 mm overall width Screw terminal EC instantaneous: 2 NO EC delayed: 2NO, 0.5...30 s SC: 1NC monitored start Basic device Maximum achieved SIL: 3/2, PL: e/d